Added licence boilerplate to our MATLAB files.

webrtc/modules/audio_processing/transient/test/plotDetection.m

Index: webrtc/modules/audio_processing/transient/test/plotDetection.m
diff --git a/webrtc/modules/audio_processing/transient/test/plotDetection.m b/webrtc/modules/audio_processing/transient/test/plotDetection.m
index f81ad504822e070d5d2d65b54ae81673cb094683..8e12ab920b268d4f9a9f5f798ee2ca1afaaa9afe 100644
--- a/webrtc/modules/audio_processing/transient/test/plotDetection.m
+++ b/webrtc/modules/audio_processing/transient/test/plotDetection.m
@@ -1,3 +1,13 @@
+%
+%  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
+%
+%  Use of this source code is governed by a BSD-style license
+%  that can be found in the LICENSE file in the root of the source
+%  tree. An additional intellectual property rights grant can be found
+%  in the file PATENTS.  All contributing project authors may
+%  be found in the AUTHORS file in the root of the source tree.
+%
+
 function [] = plotDetection(PCMfile, DATfile, fs, chunkSize)
 %[] = plotDetection(PCMfile, DATfile, fs, chunkSize)
 %